The fuel injection system relay is faulty and must be replaced. 9 - 53 FUEL PUMP SYSTEM ELEC – + ELEC – + 5. Fuel injection system relay 6. Fuel pump • Remove the fuel injection system relay • Check the condition of the fuel pump. from the wire harness. Refer to “CHECKING THE FUEL PUMP • Connect the pocket tester (Ω × 1) and bat- BODY” in chapter 6. tery (12 V) to the fuel injection system YES NO relay terminal as shown. • Check the fuel injection system relay of continuity. Replace the fuel Positive battery lead → red/black 1 pump assembly. Negative battery lead → blue/red 2 7.
Wiring Positive tester probe → brown/black 3 Negative tester probe → red/blue 4 • Check the entire fuel pump system wiring. Refer to “CIRCUIT DIAGRAM”. • Is the fuel pump system wiring properly connected and without defects? YES NO Replace the ECU. Properly connect or repair the fuel pump system wiring. • Does the fuel injection system relay have continuity between brown/black and red/ blue? YES NO YES NO 5. Fuel injection system relay • Remove the fuel injection system relay from the wire harness. • Connect the pocket tester (Ω × 1) and bat- tery (12 V) to the fuel injection system relay terminal as shown. • Check the fuel injection system relay of continuity.
Positive battery lead → red/black 1 Negative battery lead → blue/red 2 Positive tester probe → brown/black 3 Negative tester probe → red/blue 4